Electric motor.



C. BACKBR.

ELEGTRIG MOTOR. y AIPLIGATION FILED APR.6,1910.

Patented Dec. 2*?, 1910.

2 SHEETS-SHEET l.

UNITED STATES PATENT erinnert CHARLES HACKER, OF NEW YORKQJE?.V 'YASSIGNOR QF FORTZLNHQ'E NEPlUNDRl-IBTHS TO RUDOLPH ROSENFELD, OF NEW''RH, N. Y.

ELECTRIC MTOR 979,62* Specification Gf Letters Fa/wut Patented Dem 2'2"?19M). Application filed April 6, 1910. Serial No. 553,680.

To all whom t may concern: I words, 'when the armature reaches the eenBe .it known that I CHARLES Bienne o ter of the n'mo'netic fieldorc-duced b f tire 5 2, 7 I b .L citizen of the United btatee, residing:in the 1 adgaeent magnet. .Due to the fact that the l CIT borough ofBronx, Cityj county, and State ermziture does not contact with the Coreof New York have invented certain new of its, onerotnw' inanet there isno fric- .e e and. useful Improvements 1n Llectrie Motore7 tion at tinspoint.

Of Wlioir tile following is o, Clear, full, and In the accompanyingdrawings, the .mogo() exact rlescriptloir net above reerred to 1sdesignated by l This: invention relaties to en improvement and theoscillatingT or swinging fu'nizfxtnre in electric motors, theobjectbeing to proby By referring to Fig. 3D it will be vide on electric motorof suoli eonstrnetion eeen that lie immature 2 is angular in foras toobviete to e large extent any friction.V motion mid' that it is securedto e similar 6 that would `oppose its operation.. angular member theSeid two connected To accomplish the abovenanieil resulta n'leniliersforming un oscillating yoke A. l5 I have conetruoted a motor e port ofwhich The nrnmture 2 is preferably inode lroin consiste of onoscillatory armature, the seid soit .iron and the member 3 from' brassor armature 'being connected to o eranlrfearother similar nmteriel. Theyoke;A which I 7o Tied by o suitable shaft. Then the urina ileeignate byji, pivotally secured at ture oseilleted by the poll ol an adjato block5Wliieli also Carriestlie'ineg'nei 2G cent magnet the shaft will berotated. 1n l. The yoke A is provided with a yawc'onneetion with thesaid shaft, arnmtnreand member (i :adapted to receive one end oradjacent magnet, I employ specially eonvo Connecting rod or -linli 7,the other end struotevl circuit @losers which are, adapted of tho saidlink being connected with the to make and breek the circuit, for tilemeg- Crank 8 of a moin shaft 8% The shaft 8a net, :1t intervalo, theSai-icl intervals being provided with :i balance or ily-Wheel 9, timedwith respect to the oscillation of the the seid moin shaft boing carriedel; eeen armature.. f end thereof, by standards l0 and l. 3o I will nowproceed to describe my inven To {fonti-ol the energizing of the magnet ltion in and, Will finally Claim the l provicle contours; l', l2" and lilsind lil, ilo novel {mAH-@5 ringweg reference being lig! which :irelieyefl to.n ont adopted to Slide lonto the accompanying dro/Wing1orn'xin gilinlinolly oi, the Shaft Sa, the oontoots l2, part liereowherein: m being for the foro movement one? the 225 Figure 'e o, topplan view oit my jni-v Contacts i137 13 for the reverse movement ofproverl ino or; Fim il is a 'side elevation i lieniotoi. Tfm'xoveilieContacte l2, l2@ oncl l@ thereof, partly in eeetioin. the section beil2., 13 :along the slnllft 8, l employ al Shift,

lng tolren on e, line z`a in F l; ling.

I ingr device which consists of a lever 14; piv- 3 is e detail end viewthe-magnet and eootml etjl to e bracket lG. The lever 14 90 operating"armature; Figsu l and 5 are enti Carries :i pin l? rafhieli takes intoen annular vviews o other coinbi'zmtions of 10mg-nets.lx groove 18 inthe hub 19 upon wlxieli the l0 and, armatures therefor; and Figs. G andabwe-nainorl contacte are mounted. To coare iogrannnatie viewsillustrating the operate with the above-named contacts, I

operation or' my improved circuit making employ o brush eontoot 20 whichismonnte 95 and breaking device. upon ze bloei( 2l of insel tingmateriel, the

Before 1 rring to the drawings, I will seid block being eerr y e leveror eroi here State that the oseiHating;n armature, 22, pfoted et 2o, tothe loose 24 of the which I employ,A does not conti-lot with the motor,The object ol. mounting the nrish core of the adjacent or operatingmagnet, contest upon the pivotally supported arrow@ but swings entthereto, the circuit conis to adept tiie brush to be Carried towardtrolling elenients being; positioned relative or away' from the shaft 8,Where-by the seid to the movement of the armature, so t bruelrinoy loeadjusted relative to the conbreak the circuit when the armatnrelms'toets' on seid shaft, wherby the period of v 1 reached a. positlonabovethe core of the excitement of the magnet i may be shortmagnet andCentraHythereO, or7 1n other @ned or lengtlenefl es desired. Byreferring to Fig. l, it will be seen that the brush contact Q0 is in.circuit with Vthe binding post 25, and that the magnet l is connectedto the other binding post QG, and gromided in the base Q-i, the wires 2Tand being connected to source ot electrical energy not shown.

In Fig. l, the armature or yoke A is illustrated as commencing a lorwardstroke, or rather in a position at which the magnet l is energized topull the armature forward. lVhen the yoke A. is in the positionindicated, the contact l2 will impinge upon thev brush Q0, therebyclosing the circuit tor the magnet l. As the yoke mows forward the crankS will be pushed 'lfm-ward toward a vertical position. the contact l2remaining in contact. with the brusl 20. When the yoke A. has beenpulled to a vert' al position, and the crank S also moved to a vcrticalposition7 the contact 12a will leave the contact 20, thereby breakingthe circuit for the magnet l (see Fig. T). its the currentis -now eutoii from the magnet l. the `yoke A, and crank S will be moved. towardthe lett dead center. ot the crank by the momentum of the ily wheel i).They momentum of the fly wheel will carry the crank S over its lett deadcenter and start the yoke on its return stroke. After the crank 4hasslightly passed its lett dead center. the coutact l2 will imp inge uponthe brush '2O thereby energizing the magnet l. and remain in Contacttherewith until the crank reaches its lower vertical position, at whichtime the contact 12 will leave the brush 2O and break the circuit. Themomentum oi the tiy wheel 9 will carry7 the crank to and over itsrightdead center, at which time the contact it? will impinge. u-pon thebrush 20. and the o peration will be repeated.

lt will be apparent trom the above description that the magnetic iielfi,or'pull et' they magnet l, operates to swingthe yoke EL up to a verticalposition. at which time they magnetic iield is cut out, but the yoke Acontinues to swing over, due tr the momentum of the parts.

One of the chief features ot my improved motor is that the armal are isacted apen hy the magnetic lield, twice in every revolution of the mainshaft.

As the pivotal peints i tor 'the yoke A are remote trom the line ofgreatest pull of the magnet the friction thereat is reduced to aminimum.

ly reason of the angular formation otl the armature member 2 of the yoke.l there is a` certain amount of influence exerted upon the side member25) oi` the said armature b v the magnetic lield; that to say, theI sidemember 2) of the armature member 2 is placed close enough to the magneti to bring the upper portion thereof in the lield with the horizontalmember 302 For tlis reason the greater part oi' the armatura? ,nember isacted upon by the magneti-f; field. which renders the motor morepowertul than if only the horizontal member 3l) is acted upon..

By referring to lfigs.. (3 seen that the contacts l2, relative to thecrank 8, at sucn an to cause the said contacts to impinge upon the brush'20 when the. crank has passed over the dead c enters and to leave thebrush 2O when the saidcrank reaches a vertic:r l position. at which timethe armature will be centrally disposed. relative to the magnetic field.it is part of my invention to eut out the magnet-ie tield, when thearmature reaches the center thtacot` in order that there will be noopposition to the continued movement ot the armature by the meinentumot' the ily wheel. lo reverse the motor the current is eut oil' bypulling up the lever thereby :arrying the brush 2O away vfrom by aswitch placed exterand it will be l2 are disposed, angle as thecontacts. or nally ot' the motor, and then moving the hub l0 along theshalt S". by means ot the lever li, until the contacts 1.3, i3"`- comein line with the brush 20. After thc contacts 13. 13 have been broughtin line with the brush 20, the said brush can be caused to return toitsI normal position, in the event et' the brush having' been moved tocut the current ott. Should the brush not touch either the contact i3 ori3'l the wheel 9 may be moved to start the motor. l? or a reversemovement the contacts i3, 13 will control the circuit,

did the contacts movement.

, From the 'foregoing de" fion, it will be apparent that the armature myimproveffl motor "s pulled by the adjacent nn u iet, from approximatelythe limit et its svinv vertical position and is then carried to theopposite limit of its swing by momentum. 'from which point it is ralliedhat '-vard to a vertical position and is then carried onwardly bymomentum to the point from which it was started. Fig. fl illustrates atachcd thereto the magnet- (53. Beneath the magnet G3 I mount anoscillatory yoke, 65, provided with a jaw G6, which is adapted toreceive one end of a connecting link. The yoke G5 is pivotally mountedon the pin 67. Fig. two magnets 69 and an. armature 69a. Adjacent thearmature G9 I place a magnet 70. rlhe lower end ot' the vertical membersof the yoke. (3S are pivotally mounted on pins Tl -arried by the blockT2. The action of the magnets (39 and armature titl with one polarity,while the action oit the magnet 70 is to present a magnetic ticld ofopposite polarity, whereby the pull on the armature G9 is increased.

In Fig. 4 the oscillatory yoke G5 is shown bracket 6s, having at.

5 illustrates a yoke (3S which carries 1 is to magnetize the yoke G8l'lO as mounted beneath the magnet 63 and operates in the same manner asthe yoke A hereinbei'ore described- In the form as illustra-tedin F theyoke 68 and armature 69a carried thereby are magnetined by the magnets69. yoke G8 is adapted to swing across the upper face of the magnet 70in the manner de scribed for the yoke A in. Fig. 2.

Having now described my invention, what I claim and desire to secure vbyLetters 'Patent is 1- 1.An electric motor consisting of an eleetromagnethaving a core, an armature pivoted adjacent said magnet adapted formovement across the face of said core, said armature being out ofContact with said core, a shaftl provided with a crank, a linkconnecting said crank and said armature, a plurality of sets of contactsslidably mounted upon said shaft and adapted to rotate therewith, ashift-lever adapted to move said contacts, andrv a brush contact adaptedto impinge upon said slidable contacts, said brush contact beingpositioned to impinge upon one ot' said sets of slidable contacts whensaid motor is running forward, the other of said sets of slidablecontacts being adapted to impinge upon said brush contact 'when saidmotor has been reversed, the sets ot' slidable contacts last named beingbrought into alinementwith said brush contact by the movementof saidshiftlever,

The

said brush Contact being in circuit With said magnet.

2. An electric motor consisting of an electromagnet having a core, anarmature pivoted adjacent said 1nag1'i`-1 adapted for movement acrossthe face of said core, said armature being out of Contact With saidcore, a shaft rovided with a crank, a link connecting said crank andsaid armature, a plurality of sets of contacts, slidably mounted uponsaid shaft and adapted to rotate therewith, a shift lever adapted tomove said contacts, a pivotally supported lever, and a brushcontact,padapted to impinge upon said slidable contacts, carried by saidpivotally supported lever, said brush contact being adapted to impingeupon one of said sets of slidable contacts when said motor is runningforward, the other of said sets of slidable contacts being adapted toiinpinge upon said brush Contact When said motor has been Iveversed, thesets of slidable contacts last named being brought intov alinement withsaid brush contact by the movement of said shift lever, said brushContact being in circuit With said magnet. i

Signed at New York city, N. Y., this 4th day of AprilLlQlO.

CHARLES BACKER.

fitn esses:

EDWARD A. JARvIs, DAVID HnnsrFIELn.

